Add Yahoo as a preferred source to see more of our stories on Google. Many of us have felt a muscle in some part of our body suddenly and involuntarily tighten, causing a twitch or even severe cramp.

Background A 28-year-old woman presented to hospital after an episode of severe lower back spasms that occurred during a stressful family gathering. She had a history of progressive difficulty bending ...

Add Yahoo as a preferred source to see more of our stories on Google. Q: What is stiff person syndrome with which Celine Dion was diagnosed? A: Stiff-person syndrome (SPS) is a rare neurological ...

Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

The involuntary contraction of muscles that occur when your knee twitches, are usually caused by the muscles in your thigh, rather than the knee itself. The occasional twitch of your knee (or any body ...

Toe twitching, also called a tremor or a spasm, can be caused by a variety of conditions. Many simply result from temporary interruptions in your circulatory system, muscles, or joints. Others may be ...

World-renowned singer Celine Dion shared a vulnerable moment of her experience with stiff-person syndrome in a raw scene in the new documentary “I Am: Celine Dion.” The film, released Tuesday on Prime ...